Four-station transfer die for large rear quarter inner panel

Abstract

A four-station transfer die for a large rear panel of a rear wall, a trimming punch, a shaping punch and a punching punch are sequentially arranged in a fixed die seat, a horizontal guide seat A, a horizontal guide seat B and an inclined guide seat are sequentially arranged in the inner side of one end of the punching punch, three identical guide seats are sequentially arranged in the other end, a lower cutter is arranged on the edge of the trimming punch, and four round holes are uniformly arranged on the surface of the punching punch; a trimming recess, a shaping recess and a punching recess are sequentially arranged in the inner side of the lifting die seat, a special-shaped inclined wedge corresponding to the horizontal guide seat A, a long-hole inclined wedge corresponding to the horizontal guide seat B and a round-hole inclined wedge corresponding to the inclined guide seat are arranged on the inner side of the punching recess, an upper cutter is arranged on the edge of the trimming recess, and a round punch corresponding to the round hole is arranged on the surface of the punching recess; four-station stamping forming of the rear panel of the rear wall can be completed by one set of die, the problems of high production cost, large occupied production space and multiple stations of multiple die combinations are solved, and the die cost is reduced and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive molds, and in particular to a four-station transfer mold for the rear inner panel of a large component. Background Technology

[0002] The inner rear panel is a key component of the automotive rear panel assembly. Located below the trunk, inside the rear bumper, at the junction of the trunk floor and the trunk latch, it is often welded to the tailgate sill reinforcement plate to form a stable frame. It also works in conjunction with the outer rear panel and the tailgate lock mounting plate. Its structure typically uses an outer panel as the main component and an inner panel as a reinforcing beam. The material is primarily low-carbon steel such as DC01 and DC04, with a thickness of 0.7mm to 0.8mm. Functionally, it provides storage space for items such as the spare tire, absorbs impact forces with other components, improves the vehicle's torsional rigidity, serves as a mounting base for components such as the tailgate hinges, and ensures the trunk's sealing and waterproofing. See the utility model patent CN201820003494.2 for the inner rear panel of the automotive rear panel assembly. Currently, the rear inner panel is mainly manufactured by stamping dies through processes such as trimming, die-forming, and punching / side punching. These processes are generally completed by combining independent trimming dies, die-forming dies, punching dies, and side punching dies. This results in problems such as high die costs, large production space occupation, and the need to set up multiple workstations, which need to be improved. Utility Model Content

[0003] To solve the above problems, this utility model proposes a four-station transfer mold for the inner rear panel of a large component.

[0004] The technical solution of this utility model is: a four-station transfer mold for the inner rear panel of a large component, including a fixed mold base and a lifting mold base. The fixed mold base contains a trimming punch, a shaping punch, and a punching punch arranged sequentially. At one end of the punching punch, a horizontal guide seat A, a horizontal guide seat B, and an inclined guide seat are arranged in sequence, with the height of the inclined guide seat being higher than the height of the horizontal guide seat. At the other end, three identical guide seats are arranged in sequence, with the three guide seats on both sides symmetrically arranged. A lower cutter is provided along the edge of the trimming punch, and the lower cutter and upper cutter are arranged alternately, one inside and one outside. The punching die has four round holes evenly distributed on its surface. Inside the lifting die base, there are trimming dies, shaping dies, and punching dies arranged in sequence. On the inner side of the punching die, there are irregular wedges corresponding to horizontal guide A, elongated wedges corresponding to horizontal guide B, and round wedges corresponding to oblique guides. The trimming die has an upper cutter on its edge. There are guide components between the two ends of the fixed die base and the lifting die base. The guide components include guide seats and guide grooves that can slide and fit together. The surface of the punching die has round punches corresponding to the round holes.

[0005] Preferably, the trimming punch has a lower cutting blade at the middle of both sides and an upper cutting blade at the middle of both sides of the trimming die. The upper and lower cutting blades are arranged alternately and their sides are in contact with each other.

[0006] Preferably, the lifting mold base has a mold cavity inside, and the trimming die, the shaping die, and the punching die are all slidably installed in the mold cavity by a slider. A stroke limit block corresponding to the edge of each die is provided at the port of the mold cavity. Several gas springs and guide rods are evenly provided between the trimming die, the shaping die, the punching die and the mold cavity.

[0007] Preferably, two guide seats are symmetrically arranged on both sides of the inlet end of the fixed mold base, and an L-shaped limiting block is provided in the middle of the guide seat. A feeding sensor is provided on the inner side of the L-shaped limiting block, and the height of the feeding sensor is lower than the height of the surface of the L-shaped limiting block.

[0008] Preferably, both ends of the forming punch and the punching punch are provided with grooves, and a blanking sensor is installed in the groove. The blanking sensor is provided with an ear plate, which is fixedly connected to the connecting hole on the side wall of the groove through the ear plate.

[0009] Preferably, the trimming punch, the shaping punch, and the punch are all provided with limiting pins on their outer sides, and the limiting pins are provided with guide slopes on their inner sides. The shaping punch and the punch are provided with positioning pins at both ends, and the upper end of the positioning pin is pointed.

[0010] Preferably, the fixed die bases at both ends of the trimming punch and the punching punch are provided with inclined platforms, and blanking grooves are provided in the inclined platforms, which can cover the cross-sectional area of ​​the trimming punch and the punching punch.

[0011] Preferably, the fixed base mold base has buffer blocks at both ends and a boss in the middle of the fixed base mold base. A triangular reinforcing plate is provided between the boss and the fixed base mold base, and a buffer block is provided on the upper surface of the boss.

[0012] The beneficial technical effects of this utility model are as follows: This utility model arranges trimming mold, shaping mold, punching punch and oblique wedge punch in parallel in the mold base. When processing the inner rear panel, it can be placed on different punches in sequence and continuously trimmed, shaped and punched side punch by means of transfer. The inner rear panel can be stamped and formed by four processes with one set of molds. This solves the problems of high production cost, large production space occupation and many workstations of multiple sets of molds. It is conducive to reducing mold cost and improving production efficiency. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the fixed mold base; Figure 3 yes Figure 2 A top-view structural diagram; Figure 4 This is a three-dimensional structural diagram of the lifting mold base; Figure 5 It is a three-dimensional structural diagram of the punching die and each of the oblique wedges.

[0014] In the diagram, 1. Fixed die base, 11. Trimming punch, 111. Lower cutter, 112. Lower cut-off cutter, 12. Shaping punch, 13. Punching punch, 131. Round hole, 14. Horizontal guide seat A, 15. Horizontal guide seat B, 16. Angled guide seat, 2. Lifting die base, 21. Trimming die cavity, 211. Upper cutter, 212. Upper cut-off cutter, 22. Shaping die cavity, 23. Punching die cavity, 23. 1. Round punch, 232. Slider, 233. Guide rod, 24. Irregular wedge, 241. Irregular punch, 25. Long hole wedge, 251. Long hole punch, 26. Round hole wedge, 261. Round punch, 31. Guide seat, 32. L-shaped limit block, 33. Feed sensor, 4. Discharge sensor, 51. Limit pin, 52. Positioning pin, 6. Discharge chute, 71. Buffer block. Detailed Implementation

[0015] Example 1, see appendix Figure 1-4 A four-station transfer mold for the inner rear panel of a large component includes a fixed mold base 1 and a lifting mold base 2. The fixed mold base 1 is provided with a trimming punch 11, a shaping punch 12 and a punching punch 13 in sequence. The trimming punch 11 has a lower cutter 111 on its edge. The punching punch 13 has four round holes 131 evenly distributed on its surface. The size of the round holes is the same as the punching size of the workpiece. The lifting mold base 2 is provided with a trimming die 21, a shaping die 22 and a punching die 23 in sequence. The trimming die 21 has an upper cutter 211 on its edge. The upper cutter and the lower cutter cut neatly trim the edge of the workpiece. The punching die 23 has a round punch 231 on its surface that corresponds to the round holes 131. The round punch punches round holes on the surface of the workpiece.

[0016] The trimming punch 11 has a lower cutting blade 112 in the middle of both sides, and the trimming die 21 has an upper cutting blade 212 in the middle of both sides. The cutting blades cut off the long corner waste generated during trimming, forming small waste, which is convenient for discharge from the mold.

[0017] The lifting die base 2 has a mold cavity inside. The trimming die 21, the shaping die 22 and the punching die 23 are all slidably installed in the mold cavity through the slider 232. Several gas springs and guide rods 233 are evenly arranged between the trimming die, the shaping die and the punching die 23 and the mold cavity. When the mold is closed, the die can compress the gas spring and slide in the mold cavity, reducing the impact on the die and punch when the mold is closed, and avoiding damage to the workpiece that may cause cracks.

[0018] The trimming punch 11, the shaping punch 12 and the punching punch 13 are all provided with limit pins 51 on their outer sides. The shaping punch and the punching punch are provided with positioning pins 52 at both ends. The combination of limit pins and positioning pins controls the placement accuracy of the workpiece on the punch and avoids positional deviation.

[0019] Both ends of the trimming punch 11 and the punching punch 13 are provided with inclined platforms on the fixed mold base 1. A blanking groove 6 is provided in the inclined platform. The blanking groove 6 can promptly discharge the corner waste generated by trimming and punching into the mold, so as to avoid the phenomenon of corner waste blocking the mold.

[0020] Both ends of the fixed mold base are provided with buffer blocks 71, and a boss is provided in the middle of the fixed mold base 1. The upper surface of the boss is provided with buffer blocks 71. The impact force when the lifting mold base 2 and the fixed mold base 1 are closed by the buffer blocks 71 at both ends and in the middle, thereby reducing the vibration force and facilitating the control of the stamping quality.

[0021] When using this four-station transfer mold, the workpiece sheet is first placed on the trimming punch 11. After the mold is closed, the edges of the workpiece are neatly cut. Then, the mold lifting base 2 is raised, and the trimmed workpiece is placed on the middle shaping punch 12. After the mold is closed and stamped, the workpiece is stamped and formed. Then, the mold lifting base 2 is raised again, and the stamped workpiece is placed on the punching punch 13. After the mold is closed and stamped, the punching of the workpiece is completed. By transferring the workpiece to different punches in sequence, continuous trimming, shaping and punching side punching can be performed. The four-process stamping forming of the inner panel can be completed with one set of molds, which solves the problems of high production cost, large production space occupation and many workstations of multiple sets of molds.

[0022] Example 2, see appendix Figure 2-3 This embodiment is basically the same as Embodiment 1, and the similarities will not be repeated. The difference is that: two guide seats 31 are symmetrically arranged on both sides of the inlet end of the fixed mold base 1. An L-shaped limiting block 32 is provided in the middle of the guide seat 31. A feeding sensor 33 is provided on the inner side of the L-shaped limiting block 32. The two guide seats and the two L-shaped limiting blocks form a sliding bracket structure with guiding function. The workpiece plate can be accurately guided into the trimming punch 11 when placed on the sliding bracket, reducing the labor intensity of feeding. At the same time, the feeding sensor 33 is used to detect whether the workpiece plate is completely pushed into the trimming punch 11.

[0023] Both ends of the forming punch 12 and the punching punch 13 are provided with grooves, and a blanking sensor 4 is installed in the groove. The built-in blanking sensor 4 monitors whether the workpiece is placed in place during the forming and punching processes, so as to avoid the phenomenon of workpiece scrapping due to the deviation of the blanking position.

[0024] Example 3, see appendix Figure 3-5This embodiment is basically the same as Embodiment 1, and the similarities will not be repeated. The difference is that: a horizontal guide seat A 14, a horizontal guide seat B 15 and an inclined guide seat 16 are arranged in sequence from one end of the inner side of the punching punch 13. The lower end of the inclined guide seat 16 is flush with the horizontal guide seat. Three identical guide seats are arranged in sequence from the other end. The surface of the tool holder is inverted V-shaped. A shaped inclined wedge 24 corresponding to the horizontal guide seat A 14, a long hole inclined wedge 25 corresponding to the horizontal guide seat B 15 and a round hole inclined wedge 26 corresponding to the inclined guide seat 16 are arranged on the inner side of the punching die 23. A shaped punch 241 is provided on the shaped inclined wedge 24, a long hole punch 251 is provided on the long hole inclined wedge 25, and a round hole punch 131 is provided on the round hole inclined wedge 26.

[0025] During the side punching process, the irregular wedge 24, the elongated hole wedge 25, and the round hole wedge 26 move downward with the fixed mold base 1. When the die and the punch are closed, the horizontal guide seat A 14 contacts the irregular wedge 24, driving the irregular punch 241 on the irregular wedge 24 to slide into the hole on the side of the punching punch 13, forming an irregular hole on the side of the workpiece. The horizontal guide seat B 15 contacts the elongated hole wedge 25, driving the elongated hole punch 251 on the elongated hole wedge 25 to insert into the hole on the side of the punching punch 13, forming an elongated hole on the side of the workpiece. The inclined guide seat 16 contacts the round hole wedge 26, forming a round hole 131 on the side of the workpiece, thus realizing the side punching of the workpiece.

Claims

1. A four-station transfer mold for the inner rear panel of a large component, characterized in that: The device includes a fixed die base and a lifting die base. The fixed die base contains a trimming punch, a shaping punch, and a punching punch in sequence. At one end of the punching punch, a horizontal guide seat A, a horizontal guide seat B, and a slanted guide seat are arranged in sequence. At the other end, three identical guide seats are arranged in sequence. The trimming punch has a lower cutter on its edge. The punching punch has four round holes evenly distributed on its surface. The lifting die base contains a trimming die, a shaping die, and a punching die in sequence. The punching die has an irregular wedge corresponding to the horizontal guide seat A, an elongated wedge corresponding to the horizontal guide seat B, and a round wedge corresponding to the slanted guide seat on its inner side. The trimming die has an upper cutter on its edge. The punching die has a round punch corresponding to the round hole on its surface.

2. The four-station transfer mold for the inner rear panel of a large component according to claim 1, characterized in that: The trimming punch has a lower cutting blade in the middle of both sides, and the trimming die has an upper cutting blade in the middle of both sides.

3. The four-station transfer mold for the inner rear panel of a large component according to claim 1, characterized in that: The lifting mold base has a mold cavity inside. The trimming die, the shaping die, and the punching die are all slidably installed in the mold cavity by sliders. Several gas springs and guide rods are evenly arranged between the trimming die, the shaping die, the punching die and the mold cavity.

4. The four-station transfer mold for the inner rear panel of a large component according to claim 1, characterized in that: Two guide seats are symmetrically arranged on both sides of the inlet end of the fixed mold base. An L-shaped limiting block is provided in the middle of the guide seat, and a feeding sensor is provided on the inner side of the L-shaped limiting block.

5. The four-station transfer mold for the inner rear panel of a large component according to claim 1, characterized in that: Both ends of the forming punch and the punching punch are provided with grooves, and a material feeding sensor is installed in the groove.

6. The four-station transfer mold for the inner rear panel of a large component according to claim 1, characterized in that: The trimming punch, shaping punch, and punching punch are all provided with limiting pins on their outer sides, and the shaping punch and punching punch are provided with positioning pins at both ends.

7. A four-station transfer mold for the inner rear panel of a large component according to claim 1, characterized in that: Both ends of the trimming punch and the punching punch are provided with inclined platforms, and blanking grooves are provided in the inclined platforms.

8. The four-station transfer mold for the inner rear panel of a large component according to claim 1, characterized in that: Both ends of the fixed mold base are provided with buffer blocks, and a boss is provided in the middle of the fixed mold base, with buffer blocks on the upper surface of the boss.

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